public class Example15 {
    public static void main(String[] args) {
        int i,j;
        for (i = 1; i <= 9 ; i++) {
            for ( j = 1; j <= i ; j++) {
                System.out.println("*");//print输出不换行
            }
            System.out.println("\n");// \n相当于回车换行
        }
    }
}
